61298191 has 4 divisors (see below), whose sum is σ = 63275584. Its totient is φ = 59320800.

The previous prime is 61298147. The next prime is 61298249. The reversal of 61298191 is 19189216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61298191 - 2⁹ = 61297679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61298191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61298131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988650 + ... + 988711.

It is an arithmetic number, because the mean of its divisors is an integer number (15818896).

Almost surely, 2^61298191 is an apocalyptic number.

61298191 is a deficient number, since it is larger than the sum of its proper divisors (1977393).

61298191 is a wasteful number, since it uses less digits than its factorization.

61298191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977392.

The product of its digits is 7776, while the sum is 37.

The square root of 61298191 is about 7829.3161259461. The cubic root of 61298191 is about 394.2901120285.

The spelling of 61298191 in words is "sixty-one million, two hundred ninety-eight thousand, one hundred ninety-one".